[14/37] perf test: Fix 'perf test BPF' when it fails to find a suitable vmlinux

Message ID 1447955603-24895-15-git-send-email-acme@kernel.org
State New
Headers show

Commit Message

Arnaldo Carvalho de Melo Nov. 19, 2015, 5:53 p.m.
From: Wang Nan <wangnan0@huawei.com>


Two bugs in 'perf test BPF' are found when testing BPF prologue without
vmlinux:

 # mv /lib/modules/4.3.0-rc4+/build/vmlinux{,.bak}
 # ./perf test BPF
 37: Test BPF filter             :Failed to find the path for kernel: No such file or directory
 Ok

Test BPF should fail in this case.

After this patch:

 # ./perf test BPF
 37: Test BPF filter             :Failed to find the path for kernel: No such file or directory
  FAILED!
 # mv /lib/modules/4.3.0-rc4+/build/vmlinux{.bak,}
 # ./perf test BPF
 37: Test BPF filter             : Ok

Signed-off-by: Wang Nan <wangnan0@huawei.com>

Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Zefan Li <lizefan@huawei.com>
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/1447749170-175898-2-git-send-email-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

---
 tools/perf/tests/bpf.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

-- 
2.1.0

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Patch

diff --git a/tools/perf/tests/bpf.c b/tools/perf/tests/bpf.c
index d58442294e9e..232043cc232a 100644
--- a/tools/perf/tests/bpf.c
+++ b/tools/perf/tests/bpf.c
@@ -102,8 +102,7 @@  static int do_test(struct bpf_object *obj, int (*func)(void),
 	err = parse_events_load_bpf_obj(&parse_evlist, &parse_evlist.list, obj);
 	if (err || list_empty(&parse_evlist.list)) {
 		pr_debug("Failed to add events selected by BPF\n");
-		if (!err)
-			return TEST_FAIL;
+		return TEST_FAIL;
 	}
 
 	snprintf(pid, sizeof(pid), "%d", getpid());
@@ -157,8 +156,10 @@  static int do_test(struct bpf_object *obj, int (*func)(void),
 		}
 	}
 
-	if (count != expect)
+	if (count != expect) {
 		pr_debug("BPF filter result incorrect\n");
+		goto out_delete_evlist;
+	}
 
 	ret = TEST_OK;